not a happy bunny
not a happy bunnyBRITISH, INFORMAL
If you say that someone is not a happy bunny, you mean that they are annoyed or unhappy about something. I am receiving around 1,000 virus emails a day. I am not a happy bunny. Note: This expression is used humorously. Note: `Bunny' is a childish word for a rabbit, and the expression is meant to sound like part of a children's story.
not a happy bunnyused to suggest that someone is displeased. informal
2004 This Is Wiltshire Then Alan answered the phone. The majority of the conversation was unprintable. Basically the smoking chips hadn't been delivered again and Alan wasn't a happy bunny.